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Guardian Operation
A. Remove all shipping plugs from the hoses and ttings.
B. Connect the inlet and outlet hose assemblies to the unit.
C. Connect the wand assemblies, if required.
D. Place the inlet hose wand assembly into the uid to be
ltered and/or transferred.
E. Place the outlet hose/wand assembly into the container
where the uid discharge is desired.
F. Plug in the unit.
G. Flip the switch on the end of the unit to the “on” posi-
tion.
NOTE: For no-mess transportation, the inlet and outlet
hose assemblies can be screwed together by
removing the wand assembly.
Guardian Element Servicing
A. Flip the switch on the end of the unit to the “off” position
and disconnect the electrical plug.
B. Rotate the cover counter-clockwise and remove.
C. Remove the element from the housing. Discard all
disposable elements. These elements are not cleanable,
D. Place the new element In the housing, tting the o-ring
neck into the large hole at the bottom.
E. Inspect the cover o-ring and replace if necessary.
F. Replace the cover and hand-tighten.
NOTE 1: It is recommended that the Guardian be
cleaned and ushed between uses with
dissimilar uids to prevent uid mixing.
NOTE 2: Motor brushes may require changeout
every 500 service hours
Problem Cause Solution
Does not start. ON/OFF switch.
No electrical power.
Recti er.
Motor overheats (160°F).
Defective motor.
Turn switch on, replace switch if defective.
Plug in Guradian, check for tripped circuit breakers, check for
blown fuses.
Replace if defective.
Allow motor to cool, thernal overload will automatically reset.
Replace motor.
Does not start or errattic
motor noise.
Worn motor brushes. Replace motor brushes.
Intermittent start.stop oera-
tion.
High viscosity uids.
Worn motor brushes.
Defective motor.
High viscosity uids can cause the motor to overheat and cycle
intermittently.
Replace motor grushes.
Replace motor.
Hot motor. Pumping under heavy load.
Defective motor.
It is normal, under a heavy pumping load for the motor to reach
160°F.
Replace motor if shell temperature reaches greater than 170°F.
No ow or erratic pump
noise.
Filter housing not lled with oil.
Suction leak.
Obstructed outlet.
Element dirty.
Sheared pump key.
Defective Guardian.
Allow Guardian to run a few seconds.
Check tghtness of inlet ttings and hoses. Check gaskets are
in place and are not damaged. Kink or restriction in the inlet
hose.
Clear outlet.
Replace or clean element.
Replace woodruff key.
Replace unit.
No ow, erratic pump noise,
motor overheats.
Gears binding. Disassemble Guardian and throroughly clean the gear set.
Always use the inlet strainer provided to protect the unit.
Replace defective gears.
No suction. Plugged strainer. Clean or replace the inlet strainer as required.
Clean relief valve. Check for damaged internal o-rings.
Reduced oil ow. High viscosity uids.
Element dirty.
Relief valve sticks or is lodged
open.
Partially obstructed inlet or
outlet hose.
Suction leak.
Worn gears.
High viscosity uids can cause reduced ow, which is normal.
Replace or clean element.
Clean releif valve or replace if defective.
Clear the hose obstruction.
Check tightness of inlet ttings and hose.
Replace gear set.
Indicator moves to RED
Area.
Element dirty.
Oil extremely cold or viscous.
Obstruced outlet.
Defective indicator.
Replace or clean element.
Change element to coarser micron rating.
Clear outlet obstruction.
Replace indicator.
Indicator dows not seem to
move.
No element.
Defective indicator.
Install element.
Replace indicator.
Joses discolor or are hard. Fluid compatibility. Certain uids, over time, will cause the hoses to discolor. This
does not impair their performance. But, some uids will cause
the hoses to become brittle, requiring replacement.
Oil formation under unit. Defective shaft seal. Replace the motor shaft seal.
Troubleshooting Guide
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